#pragma once
#include <iostream>
#include <string>
#include <queue>
#include <pthread.h>

const static int defaultcap = 5;

template<typename T>
class BlockQueue
{
private:
bool IsFull()
{
    return _block_queue.size() == _max_cap;
}

bool IsEmpty()
{
    return _block_queue.empty();
}
public:
    BlockQueue(int cap = defaultcap) : _max_cap(cap)
    {
        pthread_mutex_init(&_mutex, nullptr);
        pthread_cond_init(&_p_cond, nullptr);
        pthread_cond_init(&_c_cond, nullptr);
    }
    void Pop(T* out)
    {
        pthread_mutex_lock(&_mutex);
        while(IsEmpty())
        {
            pthread_cond_wait(&_c_cond, &_mutex);
        }
        *out = _block_queue.front();
        _block_queue.pop();
        pthread_mutex_unlock(&_mutex);
        pthread_cond_signal(&_p_cond);
    }
    void Equeue(const T& in)
    {
        pthread_mutex_lock(&_mutex);
        while(IsFull())
        {
            pthread_cond_wait(&_p_cond, &_mutex);
        }
        _block_queue.push(in);
        pthread_mutex_unlock(&_mutex);
        pthread_cond_signal(&_c_cond);
    }

    ~BlockQueue()
    {
        pthread_mutex_destroy(&_mutex);
        pthread_cond_destroy(&_p_cond);
        pthread_cond_destroy(&_c_cond);
    }
private:
    std::queue<T> _block_queue;
    int _max_cap;
    pthread_mutex_t _mutex;
    pthread_cond_t _p_cond; //生产者条件变量
    pthread_cond_t _c_cond; //消费者条件变量
};